<?php

namespace utils\weixinpay;

class wechatpay
{
    // 定义配置项
    private $config = array(
        'APPID'      => '', // 微信支付APPID
        'MCHID'      => '', // 微信支付MCHID 商户收款账号
        'KEY'        => '', // 微信支付KEY
        'APPSECRET'  => '', //公众帐号secert
        'NOTIFY_URL' => '', // 接收支付状态的连接  改成自己的域名
    );

    // 构造函数
    public function __construct($type='')
    {
        // 如果是在thinkphp中 那么需要补全/Application/Common/Conf/config.php中的配置
        // 如果不是在thinkphp框架中使用；那么注释掉下面一行代码；直接补全 private $config 即可
        $conf = config('my')['wechart_pay'];
        if($type == 1){//小程序
            $xcx = config('my')['mini_program'];
            $appid = $xcx['app_id'];
            $appsecret =  $xcx['secret'];
        }else{//公众号
            $gzh = config('my')['official_accounts'];
            $appid = $gzh['app_id'];
            $appsecret =  $gzh['secret'];
        }

        $this->config['APPID'] = $appid;
        $this->config['APPSECRET'] =$appsecret;
        $this->config['MCHID'] = $conf['mch_id'];
        $this->config['KEY'] = $conf['key'];
    }

    /**
     *
     * 产生随机字符串，不长于32位
     * @param int $length
     * @return 产生的随机字符串
     */
    public function getNonceStr($length = 32)
    {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str   = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }
    /**
     * 统一下单
     * @param  array $order 订单 必须包含支付所需要的参数 body(产品描述)、total_fee(订单金额)、out_trade_no(订单号)、product_id(产品id)、trade_type(类型：JSAPI，NATIVE，APP)
     */
    public function unifiedOrder($order)
    {
        // 获取配置项
        $weixinpay_config = $this->config;
        $config           = array(
            'appid'            => $weixinpay_config['APPID'],
            'mch_id'           => $weixinpay_config['MCHID'],
            // 'nonce_str'        => 'test',
            'nonce_str'        => $this->getNonceStr(),
            'spbill_create_ip' => get_server_ip(),
            // 'spbill_create_ip' => '192.168.0.1',

            'notify_url'       => $order["notify_url"],
        );
		  //   $data = array(
         //       'tempurl'   => $weixinpay_config['NOTIFY_URL'],
               
         //   );
           // M('order')->where(array('order_no' => 'CS156290541211879'))->save($data);
        
//$this->success( $weixinpay_config['NOTIFY_URL'], U('order/mlist', array('orderno' =>$order['out_trade_no'])));
       
     // echo  "<script type='text/javascript'>alert('ss');</script>";
        // 合并配置数据和订单数据
        $data = array_merge($config,$order);
        // 生成签名
        $sign         = $this->makeSign($data);
        $data['sign'] = $sign;
        $xml          = $this->toXml($data);
        $url          = 'https://api.mch.weixin.qq.com/pay/unifiedorder'; //接收xml数据的文件
        $header[]     = "Content-type: text/xml"; //定义content-type为xml,注意是数组
        $ch           = curl_init($url);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 兼容本地没有指定curl.cainfo路径的错误
        curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        $response = curl_exec($ch);
        if (curl_errno($ch)) {
            // 显示报错信息；终止继续执行
            die(curl_error($ch));
        }
        $result = $this->toArray($response);
        // 显示错误信息
        if ($result['return_code'] == 'FAIL') {
            die($result['return_msg']);
        }
        $result['sign'] = $sign;
        // $result['nonce_str'] = 'test';
        return $result;
    }

    /**
     * 验证
     * @return array 返回数组格式的notify数据
     */
    public function notify()
    {
        // 获取xml
        $xml = file_get_contents('php://input', 'r');
        // 转成php数组
        $data = $this->toArray($xml);
        // 保存原sign
        $data_sign = $data['sign'];
        // sign不参与签名
        unset($data['sign']);
        $sign = $this->makeSign($data);
        // 判断签名是否正确  判断支付状态
        if ($sign === $data_sign && $data['return_code'] == 'SUCCESS' && $data['result_code'] == 'SUCCESS') {
            $result = $data;
        } else {
            $result = false;
        }
        // 返回状态给微信服务器
        if ($result) {
            $str = '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
        } else {
            $str = '<xml><return_code><![CDATA[FAIL]]></return_code><return_msg><![CDATA[签名失败]]></return_msg></xml>';
        }
        echo $str;
        return $result;
    }

    /**
     * 输出xml字符
     * @throws WxPayException
     **/
    public function toXml($data)
    {
        if (!is_array($data) || count($data) <= 0) {
            throw new WxPayException("数组数据异常！");
        }
        $xml = "<xml>";
        foreach ($data as $key => $val) {
            if (is_numeric($val)) {
                $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
            } else {
                $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
            }
        }
        $xml .= "</xml>";
        return $xml;
    }

    /**
     * 生成签名
     * @return 签名，本函数不覆盖sign成员变量，如要设置签名需要调用SetSign方法赋值
     */
    public function makeSign($data)
    {
        // 去空
        $data = array_filter($data);
        //签名步骤一：按字典序排序参数
        ksort($data);
        $string_a = http_build_query($data);
        $string_a = urldecode($string_a);
        //签名步骤二：在string后加入KEY
        $config           = $this->config;
        $string_sign_temp = $string_a . "&key=" . $config['KEY'];
        //签名步骤三：MD5加密
        $sign = md5($string_sign_temp);
        // 签名步骤四：所有字符转为大写
        $result = strtoupper($sign);
        return $result;
    }

    /**
     * 将xml转为array
     * @param  string $xml xml字符串
     * @return array       转换得到的数组
     */
    public function toArray($xml)
    {
        //禁止引用外部xml实体
        libxml_disable_entity_loader(true);
        $result = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $result;
    }

    public function GetOpenid($data)
    {
        // 获取配置项
        $config = $this->config;
        // 如果没有get参数没有code；则重定向去获取openid；
        if (!isset($data['code'])) {
            // 获取订单号
            // 返回的url
            //触发微信返回code码
            $urlpath = http_build_query($data);
            $redirect_uri = urlencode('http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'].'?'.$urlpath); //.$_SERVER['QUERY_STRING']
            // $redirect_uri = urlencode($redirect_uri);
            $url = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' . $config['APPID'] . '&redirect_uri=' . $redirect_uri . '&response_type=code&scope=snsapi_base&state=STATE#wechat_redirect';
            redirect($url);
        } else {
            // 如果有code参数；则表示获取到openid
            $code =$data['code'];
            // 取出订单号
//            $out_trade_no = I('get.state', 0, 'intval');
            // 组合获取prepay_id的url
            $url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . $config['APPID'] . '&secret=' . $config['APPSECRET'] . '&code=' . $code . '&grant_type=authorization_code';

            $ch = curl_init();
            //设置超时
            curl_setopt($ch, CURLOPT_TIMEOUT, 360000);
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
            curl_setopt($ch, CURLOPT_HEADER, false);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            //运行curl，结果以jason形式返回
            $res = curl_exec($ch);
            curl_close($ch);
            //取出openid
            $data   = json_decode($res, true);
            return $data;
        }
    }
    /**
     * 获取jssdk需要用到的数据
     * @return array jssdk需要用到的数据
     */
    public function getParameters()
    {
        // 获取配置项
        $config = $this->config;
        // 如果没有get参数没有code；则重定向去获取openid；
        if (!isset($_GET['code'])) {
            // 获取订单号
            $out_trade_no = I('get.out_trade_no', 1, 'intval');
            // 返回的url
            $redirect_uri = U('Api/Weixinpay/pay', '', '', true);
            $redirect_uri = urlencode($redirect_uri);
            $url          = 'https://open.weixin.qq.com/connect/oauth2/authorize?appid=' . $config['APPID'] . '&redirect_uri=' . $redirect_uri . '&response_type=code&scope=snsapi_base&state=' . $out_trade_no . '#wechat_redirect';
            redirect($url);
        } else {
            // 如果有code参数；则表示获取到openid
            $code = I('get.code');
            // 取出订单号
            $out_trade_no = I('get.state', 0, 'intval');
            // 组合获取prepay_id的url
            $url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' . $config['APPID'] . '&secret=' . $config['APPSECRET'] . '&code=' . $code . '&grant_type=authorization_code';
            // curl获取prepay_id
            $result = $this->curl_get_contents($url);
            $result = json_decode($result, true);
            $openid = $result['openid'];
            // 订单数据  请根据订单号out_trade_no 从数据库中查出实际的body、total_fee、out_trade_no、product_id
            $order = array(
                'body'         => 'test', // 商品描述（需要根据自己的业务修改）
                'total_fee'    => 1, // 订单金额  以(分)为单位（需要根据自己的业务修改）
                'out_trade_no' => $out_trade_no, // 订单号（需要根据自己的业务修改）
                'product_id'   => '1', // 商品id（需要根据自己的业务修改）
                'trade_type'   => 'JSAPI', // JSAPI公众号支付
                'openid'       => $openid, // 获取到的openid
            );
            // 统一下单 获取prepay_id
            $unified_order = $this->unifiedOrder($order);
            // 获取当前时间戳
            $time = time();
            // 组合jssdk需要用到的数据
            $data = array(
                'appId'     => $config['APPID'], //appid
                'timeStamp' => strval($time), //时间戳
                'nonceStr'  => $unified_order['nonce_str'], // 随机字符串
                'package'   => 'prepay_id=' . $unified_order['prepay_id'], // 预支付交易会话标识
                'signType'  => 'MD5', //加密方式
            );
            // 生成签名
            $data['paySign'] = $this->makeSign($data);
            return $data;
        }
    }

    /***
     * 获取用户信息
     * @return array
     */
    public function get_snsapi_userinfo($access_token,$openid)
    {
        $url = "https://api.weixin.qq.com/sns/userinfo?access_token=$access_token&openid=OPENID$openid&lang=zh_CN";
        $res = $this->curl_get_contents($url);
        return $res;
    }

    /**
     * 生成支付二维码
     * @param  array $order 订单 必须包含支付所需要的参数 body(产品描述)、total_fee(订单金额)、out_trade_no(订单号)、product_id(产品id)、trade_type(类型：JSAPI，NATIVE，APP)
     */
    public function pay($order)
    { 
        $result    = $this->unifiedOrder($order);
		
        $decodeurl = urldecode($result['code_url']);
        qrcode($decodeurl);
    }
    public function mweb($order)
    {
        $result       = $this->unifiedOrder($order);
        return $result;
    }

    /**
     *
     * 获取jsapi支付的参数
     * @param array $UnifiedOrderResult 统一支付接口返回的数据
     * @throws WxPayException
     *
     * @return json数据，可直接填入js函数作为参数
     */
    public function GetJsApiParameters($OrderResult)
    {
        $config             = $this->config;
        $jsapi              = [];
        $jsapi['appId']     = $config['appid'];
        $timeStamp          = time();
        $jsapi['timeStamp'] = "$timeStamp";
        $jsapi['nonceStr']  = $this->getNonceStr();
        $jsapi['package']   = $OrderResult['prepay_id'];
        $jsapi['signType']  = 'MD5';
        $jsapi['paySign']   = $OrderResult['paySign'];
        $parameters         = json_encode($jsapi);
        return $parameters;
    }
    public function jspay($order,$data,$openid = '')
    {
        $config = $this->config;
        if($openid == ''){
            $openId = $this->GetOpenid($data);
            $openId or exit('登录失败！');
        }else{
            $openId = $openid;
        }

        // 统一下单 获取prepay_id
        $order['openid'] = $openId;

        $unified_order   = $this->unifiedOrder($order);
        // 获取当前时间戳
        $time = time();
        // 组合jssdk需要用到的数据
        $data = array(
            'appId'     => $config['APPID'], //appid
            'timeStamp' => strval($time), //时间戳
            'nonceStr'  => $unified_order['nonce_str'], // 随机字符串
            'package'   => 'prepay_id=' . $unified_order['prepay_id'], // 预支付交易会话标识
            'signType'  => 'MD5', //加密方式
        );
        // 生成签名
        $data['paySign'] = $this->makeSign($data);
      
        return $data;
    }


    /**
     * curl 请求http
     */
    public function curl_get_contents($url)
    {

        $ch = curl_init();
        //设置超时
        curl_setopt($ch, CURLOPT_TIMEOUT, 360000);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        //运行curl，结果以jason形式返回
        $res = curl_exec($ch);
        curl_close($ch);
        //取出openid
        $data   = json_decode($res, true);
        return $data;
    }

}
